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Mid-point Review

This summary presents the mid-point review of polishing tests and the introduction of an improved holder design. It covers different polishing methods using diamond and CBN mandrils, along with test results and findings related to lubrication theory and hydraulic lash adjusters. Despite initial skepticism about material changes, the team is encouraged to proceed with polishing tests. An adjustable holder design is being developed to enhance stability during polishing. Imaging analyses will be conducted, and results will be communicated with GT's engineers for further insights.

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Mid-point Review

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Presentation Transcript

  1. Mid-point Review

  2. Project Overview • Different Polishers • Test results • Imaging • Improved Holder • Lubrication Theory

  3. Hydraulic Lash Adjuster • Purpose of Lash Adjuster

  4. Different Polishers • Engis Corporation • Manufacter Diamond and CBN (Cubic Boron Nitride) electoplated and impregnated mandrils • Highly expensive due to custom order

  5. Polishing Tests • Engineers at GT didn’t seem to think material change improve polish • Super-abrasives might still last longer than ruby • However, the group was encouraged to continue with the polishing test and provide the results to GT.

  6. Polishing Test… • The tests will be performed with the fine grit ruby stone. • Our contact at GT, Dan Faulkner will setup the polishers for the experiment. • Due to the amount of business that GT incurs, polishing tests have not yet been done.

  7. Imaging • Contacted Dr. Liang at the FAMU-FSU COE IE • Minolta imaging machine was capable but out of service. • Samples will be sent to Dymek for analysis

  8. Improved Holder • Currently there three different stone lengths. • Long stones extend well past the holder end causing the polishing stone to be less stable • We will design an adjustable holder for various stone lengths.

  9. Preliminary Design • Metal Sleeve to extend support • Locking nut to secure the location of the support

  10. Lubrication Theory Capillary seal involves flow around two concentric cylinders Spherical bearing measures the thin flow around a spherical check valve

  11. Leak Calculations

  12. Leak Calculations

  13. Website • http://www.eng.fsu.edu/ME_senior_design/2008/team10/ Questions???

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